US20190027116A1 - Image display device, the image display system, and image display method - Google Patents
Image display device, the image display system, and image display method Download PDFInfo
- Publication number
- US20190027116A1 US20190027116A1 US16/119,507 US201816119507A US2019027116A1 US 20190027116 A1 US20190027116 A1 US 20190027116A1 US 201816119507 A US201816119507 A US 201816119507A US 2019027116 A1 US2019027116 A1 US 2019027116A1
- Authority
- US
- United States
- Prior art keywords
- image display
- image
- image information
- display device
- row
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/12—Synchronisation between the display unit and other units, e.g. other display units, video-disc players
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/1423—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display
- G06F3/1446—Digital output to display device ; Cooperation and interconnection of the display device with other functional units controlling a plurality of local displays, e.g. CRT and flat panel display display composed of modules, e.g. video walls
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/14—Display of multiple viewports
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2300/00—Aspects of the constitution of display devices
- G09G2300/02—Composition of display devices
- G09G2300/026—Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0202—Addressing of scan or signal lines
- G09G2310/0216—Interleaved control phases for different scan lines in the same sub-field, e.g. initialization, addressing and sustaining in plasma displays that are not simultaneous for all scan lines
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/18—Timing circuits for raster scan displays
Definitions
- the present invention relates to an image display device, an image display system, and an image display method, which are utilized for multi-display technology.
- An example of electronic advertisement bulletin boards provided on buildings or the like utilizes a (multi-display or multi-monitor) technique in which a plurality of display panels (i.e., displays) are arrayed in one or both of the vertical and horizontal directions so as to display one image (as a whole) on the whole of the displays and thus implement a large screen.
- a display panel i.e., displays
- each display panel displays an image by scanning each frame in the horizontal direction while simultaneously scanning the frame in the vertical direction.
- each display panel has n lines (horizontal lines).
- the display panel performs the relevant drawing process from the first line (the top of the display panel) to the last n-th line (the bottom of the display panel) to complete the display of the target image.
- the display panel repeats the above scanning process in the horizontal and vertical directions, for each of different images.
- FIG. 6A is a diagram utilized to explain a display shift produced in an image display system related to an embodiment of the present invention.
- FIG. 6B is a diagram utilized to show an example of displayed images in individual frames.
- FIG. 6A time is shown along the horizontal axis and the vertical axis corresponds to the vertical direction of each display panel, by which transition in the display image in each display panel is shown.
- FIG. 6B shows display images of (N ⁇ 1)th, N-th, and (N+1)th frames.
- the scanning in the vertical direction is synchronously performed between all display panels.
- the individual display panels simultaneously start the drawing of the first line of a different image (i.e., image N) (see FIG. 6A ).
- the upper display panel still displays the n-th line of the (N ⁇ 1)th image while the first line of the lower display panel already displays the N-th image.
- all display panels display the same image.
- a display shift of one frame is always produced at the boundary between the upper and lower adjacent display panels.
- Patent Document 1 displays a technique in which of any two vertically adjacent display panels, the start time of the vertical scanning of the lower display panel is delayed by one frame. According to this technique, it is possible to cancel a display shift of one frame produced at the boundary between the upper and lower adjacent display panels.
- Patent Document 1 Japanese Unexamined Patent Application, First Publication No. 2001-222269.
- FIG. 7A is a diagram utilized to explain display shift correction means in an image display system related to an embodiment of the present invention.
- FIG. 7B is a diagram utilized to show an example of displayed images in individual frames.
- FIGS. 7A and 7B respectively show the transition in the display image in each display panel and the display images of (N ⁇ 1)th, N-th, and (N+1)th frames.
- the start time of the vertical scanning of the lower display panel is delayed by one frame. Accordingly, as shown in FIG. 7A , the same image is always displayed at the boundary between the upper and lower display panels.
- an image display system consists of only two upper and lower panels can be handled by producing only one-frame delay.
- time required to the completion of the drawing is delayed by the number of frames corresponding to the number of the vertically arranged display panels (see FIG. 7A ).
- the time from the start to the completion of the drawing of one image (as a whole) over all of the display panels increases. Accordingly, if a sudden screen switching or the like occurs, then visually, the switching of the image displayed at the lower side is delayed.
- the present invention provides an image display device, an image display system, and an image display method.
- an image display device has a display panel, the device being utilized to form an image display system in which a plurality of the image display devices are arrayed in one or both of vertical and horizontal directions to display one image as a whole while an image allocated to each device is displayed via the corresponding display panel.
- the image display device includes: a reading processing unit that reads out image information and delays start of output of this image information by a predetermined period of time determined based on the number of the image display devices which forms the image display system and a row to which the present device belongs in the vertical arrangement.
- an image display system in which a plurality of the image display devices are arrayed in one or both of vertical and horizontal directions to display one image as a whole while an image allocated to each device is displayed via the corresponding display panel, includes:
- each of the image display devices has a reading processing unit that reads out image information and delays start of output of this image information by a predetermined period of time determined based on the number of the image display devices and a row to which the present device belongs in the vertical arrangement.
- a reading processing unit provided in each of the image display devices reads out image information and delays start of output of this image information by a predetermined period of time determined based on the number of the image display devices and a row to which the present device belongs in the vertical arrangement.
- FIG. 1 is a diagram showing a functional configuration of an image information processing device according to an embodiment of the present invention.
- FIG. 2 is a diagram showing a functional configuration of an image display system according to an embodiment of the present invention.
- FIG. 3 is a diagram showing a timing chart of the vertical synchronizing signal generated by the reading processing unit according to an embodiment of the present invention.
- FIG. 4A is a first diagram utilized to explain an effect based on the operation of the image information processing device according to an embodiment of the present invention.
- FIG. 4B is a diagram utilized to show an example of displayed images in individual frames.
- FIG. 5 is a second diagram utilized to explain an effect based on the operation of the image information processing device according to an embodiment of the present invention.
- FIG. 6A is a diagram utilized to explain a display shift produced in an image display system related to the present invention.
- FIG. 6B is a diagram utilized to show an example of displayed images in individual frames.
- FIG. 7A is a diagram utilized to explain display shift correction means in an image display system related to the present invention.
- FIG. 7B is a diagram utilized to show an example of displayed images in individual frames.
- FIG. 1 is a diagram showing a functional configuration of an image information processing device according to an embodiment of the present invention.
- An image information processing device 1 pertaining to the present embodiment has a writing processing unit 10 , an image information storage unit 11 , and a reading processing unit 12 .
- FIG. 2 is a diagram showing a functional configuration of an image display system according to an embodiment of the present invention.
- an image display system 100 has a plurality of image display devices 5 , each including the image information processing device 1 , an information input unit 2 , a drive unit 3 , and a display panel 4 .
- FIG. 2 shows only one image display device 5
- the image display system 100 actually includes the plurality of the image display devices 5 .
- the image display devices 5 each including the image information processing device 1 , the information input unit 2 , the drive unit 3 , and the display panel 4 , display images allocated to the individual image display devices 5 via the display panels 4 provided therein.
- Such image display devices 5 are arrayed in one or both of the vertical and horizontal directions so as to form the image display system 100 which displays one image as a whole.
- the image information processing device 1 stores information, in advance in a storage unit (not shown), about a position to which the image display device 5 provided with this image information processing device 1 belongs. For example, when the image display system 100 is formed by arranging three image display devices 5 both in the vertical and horizontal directions, the image information processing device 1 stores arrangement information of the image display devices 5 (it may be represented by X and Y coordinates, where X and Y each have a value of 1 to 3).
- the image information processing device 1 Based on the arrangement information, the image information processing device 1 applies a predetermined process to image information input to the corresponding image display device 5 and outputs the image information (to which the predetermined process has been applied) to the display panel 4 of the relevant image display device 5 .
- the present embodiment is not limited to such an arrangement.
- the writing processing unit 10 is a functional unit to receive image information from an external device at every moment and store received individual information items serially in the image information storage unit 11 .
- the writing processing unit 10 generates a writing clock signal obtained by multiplying a horizontal synchronizing signal to have an integral multiple thereof, where the horizontal synchronizing signal is input together with the image information.
- this generation process of the writing clock signal performed in the writing processing unit 10 is performed spontaneously by the writing processing unit 10 , it may be performed in accordance with an instruction from a control unit (not shown) provided separately in the image information processing device 1 .
- the above image information is image information utilized to display a complete (one) image as a whole by the entire image display system 100 . Therefore, the image information is input, in common, into each of the image information processing devices 1 which belongs to the corresponding image display device 5 .
- the image information storage unit 11 has an area utilized to temporarily store the image information input into the writing processing unit 10 .
- the image information storage unit 11 is characterized by having an memory area capable of storing image information of one frame and also image information of at least one line.
- This image information storage unit 11 is generally a storage device called a “video memory”.
- the reading processing unit 12 is a functional unit which outputs partial image information allocated to the own device (i.e., the present image display device 5 of this reading processing unit 12 ) in the image information stored in the image information storage unit 11 , to the display panel 4 at every moment. That is, the reading processing unit 12 reads out the partial image information, which is a region allocated to the own device (the image display device 5 ) in the image information stored in the image information storage unit 11 , and outputs the read information to the display panel 4 . In this process, the reading processing unit 12 refers to the arrangement information which is stored by the image information processing device 1 in advance.
- the reading processing unit 12 reads out, in the image information stored in the image information storage unit 11 , (information of) a region corresponding to the upper left 1 ⁇ 3 of an image to be displayed based on the relevant image information. Furthermore, the reading processing unit 12 outputs the relevant image information by processing the above upper left 1 ⁇ 3 region so as to be displayed as a triple-enlarged image on the display panel 4 . Such a process is performed by the image information processing device 1 of each of the image display devices 5 and thus one enlarged image is displayed by the nine image display devices 5 in the image display system 100 .
- the information input unit 2 is a functional unit utilized to receive the image information input from an external device, which may be a video recorder, a video playback device, or the like. If the input image information is an analog signal, the information input unit 2 may be provided with an A/D converter.
- the drive unit 3 is a functional unit utilized to perform an electric process of actually displaying a predetermined image on the display panel 4 based on an electrical signal of the image information input from the image information processing device 1 .
- a functional unit is an electric circuit element called a “gate driver”, a “source driver”, or the like.
- the display panel 4 is a functional unit utilized to display, according to the above electric process of the drive unit 3 based on the image information, an image based on the relevant image information in a manner visible to users. More specifically, the display panel 4 may be a liquid crystal display panel, an organic EL display panel, a plasma display panel, or the like. In addition, the image display system 100 implements a large screen by arraying a plurality of the image display devices 5 , each including the display panel 4 , in one or both of the vertical and horizontal directions.
- FIG. 3 is a diagram showing a timing chart of the vertical synchronizing signal generated by the reading processing unit according to an embodiment of the present invention.
- the reading processing unit 12 receives a first vertical synchronizing signal.
- the first vertical synchronizing signal is a common signal input into each of the image information processing devices 1 , and a reference signal utilized by the display panels 4 to display one image as a whole.
- the first vertical synchronizing signal is a signal that outputs a negative pulse signal for each frame. Based on the timing decided by the negative pulses, the reading processing unit 12 starts the output of the image information.
- the writing processing unit 10 writes the image information of one image in the image information storage unit 11 sequentially.
- frame is a unit of the image information, utilized to display one image (from the first line to the n-th line thereof) by one display panel.
- the reading processing unit 12 in the present embodiment is characterized by delaying the start of the signal output to the display panel 4 by a predetermined period of time determined based on the number (N) of the image display devices 5 arranged vertically. Below, a specific processing thereof will be explained.
- the reading processing unit 12 when the reading processing unit 12 receives the first vertical synchronizing signal, the reading processing unit 12 refers to the position (X and Y) of the display panel 4 of the present device and the vertical arrangement number N which denotes the number of the image display devices 5 arranged vertically in the image display system 100 .
- the image information processing device 1 of each of the image display devices 5 which form the image display system 100 stores the vertical arrangement number N in a predetermined storage unit (not shown) in advance. Since the image display system 100 explained in the present embodiment is a system in which three image display devices 5 are arrayed in each of the vertical and horizontal directions, the vertical arrangement number N is 3.
- the reading processing unit 12 also delays the start of the signal output to the display panel 4 by a predetermined period of time determined based on the row (i-th row), in the vertical arrangement (number N), to which (the i-th row) the own device (the image display device 5 ) belongs.
- the image display devices 5 which belong to the top row are represented as belonging to “the first row”
- the image display devices 5 which belong to the middle row are represented as belonging to “the second row”
- the image display devices 5 which belong to the bottom row are represented as belonging to “the third row”.
- the reading processing unit 12 refers to the vertical arrangement number N and the coordinate information of its own device (the image display device 5 ) to determine which row the own device belongs to. After the reading processing unit 12 identifies the vertical arrangement number (N) and the row (i) to which the relevant display panel 4 belongs, a delay amount Td is computed based on the following formula.
- “V” in Formula (1) is a unit time length required to display an image per unit frame on one display panel 4 (i.e., “1V” equals a time length required to display an image of one frame).
- the reading processing unit 12 computes second vertical synchronizing signals as explained below. Since the delay amount Td is 0 when the own device (the image display device 5 ) belongs to the first row, the corresponding reading processing unit 12 directly uses the received first vertical synchronizing signal as the second vertical synchronizing signal without performing any process for the first vertical synchronizing signal (see FIG. 3 ). Since the delay amount Td is 1 ⁇ 2V (i.e., (1 ⁇ 2)V) when the own device belongs to the second row, the corresponding reading processing unit 12 applies a delay shift of 1 ⁇ 2V to the first vertical synchronizing signal and uses the delayed signal as the second vertical synchronizing signal (see FIG. 3 ).
- the corresponding reading processing unit 12 applies a delay shift of 1V to the first vertical synchronizing signal and uses the delayed signal as the second vertical synchronizing signal (see FIG. 3 ).
- the reading processing units 12 of the image display devices 5 arranged in the first row each read out partial image information (for the first row) allocated to each device from the image information storage unit 11 and outputs the relevant partial image information from time T 0 to time T 1 (i.e., after 1V), by performing no delay operation.
- the reading processing unit 12 displays an image based on the partial image information in a triple-enlarged manner.
- the reading processing units 12 of the image display devices 5 arranged in the second row each read out partial image information (for the second row) allocated to each device from the image information storage unit 11 and outputs the relevant partial image information from time T 01 to time T 11 (i.e., after 1V), by applying a delay of 1 ⁇ 2V to time T 0 .
- the reading processing unit 12 also displays an image based on the partial image information in a triple-enlarged manner.
- the reading processing units 12 of the image display devices 5 arranged in the third row each read out partial image information (for the third row) allocated to each device from the image information storage unit 1 and outputs the relevant partial image information from time T 1 to time T 2 (i.e., after 1V), by applying a delay of 1V to time T 0 .
- the reading processing unit 12 also displays an image based on the partial image information in a triple-enlarged manner.
- FIG. 4A is a first diagram utilized to explain an effect based on the operation of the image information processing device according to an embodiment of the present invention.
- FIG. 4B is a diagram utilized to show an example of displayed images in individual frames.
- FIGS. 4A and 4B respectively show a transition in the image displayed in the image display devices 5 and display images of (N ⁇ 1)th, N-th, and (N+1)th frames.
- FIG. 4A shows that the first line of each display panel in the first row starts display of image N ⁇ 1 (i.e., the (N ⁇ 1)th image) from time T 0 and the displayed image is switched to image N at time T 1 .
- FIG. 4A also shows that the n-th line of the display panel 4 of each image display device 5 in the first row starts display of image N ⁇ 1 from time T 1 and the displayed image is switched to image N at time T 2 .
- the first line of the display panel 4 of each image display device 5 in the second row starts display of image N ⁇ 1 from time T 01 and the displayed image is switched to image N at time T 11 .
- the n-th line of the display panel 4 of the image display device 5 in the second row starts display of image N ⁇ 1 from time T 11 and the displayed image is switched to image N at time T 21 .
- the first line of the display panel 4 of each image display device 5 in the third row starts display of image N ⁇ 1 from time T 1 and the displayed image is switched to image N at time T 2 .
- the n-th line of the display panel 4 of the image display device 5 in the third row starts display of image N ⁇ 1 from time T 2 and the displayed image is switched to image N at time T 3 .
- display of each image display device 5 in the first row is started at time T 0 . That is, for image N ⁇ 1, the display panel 4 of each image display device 5 located in the first row starts the display of the first line at T 0 , sequentially advances the relevant drawing within the time length 1V, and completes the drawing of the n-th line at time T 1 . At this time T 1 , the display panel 4 of each image display device 5 in the first row completes the image N ⁇ 1.
- the display panel 4 of each image display device 5 located in the second row starts the display of the first line at T 01 when 1 ⁇ 2V has just elapsed from time T 0 (see FIG. 4A ).
- the display panel 4 of each image display device 5 located in the first row has completed the drawing of only the upper half of image N ⁇ 1.
- the display panel 4 of each image display device 5 in the second row sequentially advances the relevant drawing within the time length 1V measured from time T 01 , and completes the drawing of the n-th line at time T 11 .
- the display panel 4 of each image display device 5 located in the third row starts the display of the first line at T 1 when 1V has just elapsed from time T 0 (see FIG. 4A ).
- the display panel 4 of each image display device 5 located in the first row has completed the drawing of the entire image N ⁇ 1
- the display panel 4 of each image display device 5 located in the second row has completed the drawing of only the upper half of image N ⁇ 1.
- the display panel 4 of each image display device 5 in the third row sequentially advances the relevant drawing within the time length 1V measured from time T 1 , and completes the drawing of the n-th line at time T 2 .
- the image information processing device 1 According to the display operation of an image by the image information processing device 1 , no delay of one frame or greater is produced between the image displayed by the image display devices 5 located in the first row and the image displayed by the image display devices 5 located in the third row.
- the image information processing device 1 can perform the image display while generating a time length 1 ⁇ 2V during which the same image is displayed at the boundary between the upper and lower adjacent display panels.
- the image information processing device 1 of the present embodiment no considerable delay is generated in the operation of displaying one image, and it is possible to reduce a display shift produced at the boundary between the display panels.
- the image information storage unit 11 has an memory area capable of storing image information of one frame and further image information of at least one line.
- the writing processing unit 10 writes the image information of one frame in the image information storage unit 11 sequentially at every moment, based on the first vertical synchronizing signal. That is, in FIG. 4A , the writing processing unit 10 writes the image information, from image information corresponding to the first line to the image information corresponding to the n-th line, within a time length from time T 0 to time T 1 . In the next time length (from time T 1 to time T 2 ), different image information (N) is overwritten on the image information storage unit 11 . Accordingly, the writing processing unit 10 overwrites the image information utilized to the drawing of the next image sequentially for each frame, based on the first vertical synchronizing signal.
- each image display device 5 located in the first row can advance the drawing operation by using the image information storage unit 11 sequentially at every moment, based on the first vertical synchronizing signal without problems.
- the partial image information for each image display device 5 located in the second row i.e., partial image information for the middle 1 ⁇ 3 of image N ⁇ 1
- the image information for the next image i.e., image N.
- the drawing operation can be advanced without problems.
- the image information storage unit 11 For the partial image information for each image display device 5 located in the third row (i.e., partial image information for the lower 1 ⁇ 3 of image N ⁇ 1), at time T 2 when the n-th line of the display panel 4 should be displayed, the image information corresponding to the bottom line in the image information of image N ⁇ 1 stored in the image information storage unit 11 is overwritten with the image information of image N. Therefore, in order to display the image information, which corresponds to the bottom line in the image information of image N ⁇ 1, in the n-th line of each display panel 4 of the third row at time T 2 , it is necessary to store, in advance, the image information for the n-th line of image N ⁇ 1, separately in a memory area provided as a reserve. Accordingly, in addition to the memory area utilized to store image information of one frame, the image information storage unit 11 also has a memory area utilized to store at least one line.
- FIG. 5 is a second diagram utilized to explain an effect based on the operation of the image information processing device according to an embodiment of the present invention.
- the reading processing unit 12 of each image display device 5 determines that a delay amount of 1 ⁇ 3V is assigned to the display panels 4 in the second row, a delay amount of 2 ⁇ 3V is assigned to the display panels 4 in the third row, and a delay amount of 1V is assigned to the display panels 4 in the fourth row.
- the display panel 4 of each image display device 5 in the second row starts the drawing of the first line at time T 01 when 1 ⁇ 3V has just elapsed from time T 0 (see FIG. 5 ).
- the display panel 4 of each image display device 5 in the second row sequentially advances the relevant drawing within the time length 1V measured from time T 01 , and completes the drawing of the n-th line at time T 11 .
- the image of the n-th line of the display panel 4 of each image display device 5 in the first row coincides with the image of the first line of the display panel 4 of each image display device 5 in the second row.
- the display panel 4 of each image display device 5 in the third row starts the drawing of the first line at time T 02 when 2 ⁇ 3V has just elapsed from time T 0 (see FIG. 5 ).
- the display panel 4 of each image display device 5 in the third row sequentially advances the relevant drawing within the time length 1V measured from time T 02 , and completes the drawing of the n-th line at time T 12 .
- the image of the n-th line of the display panel 4 of each image display device 5 in the second row coincides with the image of the first line of the display panel 4 of each image display device 5 in the third row.
- the image of the n-th line of the display panel 4 of each image display device 5 in the third row coincides with the image of the first line of the display panel 4 of each image display device 5 in the fourth row.
- the image information processing device 1 can perform the image display while generating a time length 1 ⁇ 3V during which the same image is displayed at the boundary between the upper and lower adjacent display panels.
- the above-described image display system 100 includes a computer system.
- the individual steps in the operation of the image display system 100 are stored as a program in a computer-readable storage medium, and the operation is performed when the relevant computer loads and executes the program.
- the above computer readable storage medium is a magnetic disk, magneto optical disk, CD-ROM, DVD-ROM, semiconductor memory, or the like.
- the relevant computer program may be provided to a computer via a communication line, and the computer which received the program may execute the program.
- the image display system 100 has a mode in which a plurality of image display devices 5 , each including the image information processing device 1 and the display panel 4 , by which the image information processing device 1 is assigned with each display panel 4 .
- this mode is not limited in other embodiments.
- the image display system 100 may have a form in which a plurality of display panels 4 and one image information processing device 1 are provided.
- the relevant image information processing device 1 may have an image information distribution unit that distributes image information items distributed and output to the individual display panels 4 .
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Multimedia (AREA)
- Human Computer Interaction (AREA)
- General Engineering & Computer Science (AREA)
- Controls And Circuits For Display Device (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
Description
- The present application is a Continuation Application of U.S. patent application Ser. No. 15/101,390, filed on Jun. 2, 2016, the entire contents of which are hereby incorporated by reference.
- The present invention relates to an image display device, an image display system, and an image display method, which are utilized for multi-display technology.
- An example of electronic advertisement bulletin boards provided on buildings or the like utilizes a (multi-display or multi-monitor) technique in which a plurality of display panels (i.e., displays) are arrayed in one or both of the vertical and horizontal directions so as to display one image (as a whole) on the whole of the displays and thus implement a large screen.
- In an image display system utilizing the above multi-display technique, the whole of the individual display panels display one image. Therefore, when each display panel employs an ordinary display device, a display shift of one frame may be produced between upper and lower (adjacent) display panels. More specifically, each display panel displays an image by scanning each frame in the horizontal direction while simultaneously scanning the frame in the vertical direction. For example, it is assumed that each display panel has n lines (horizontal lines). In this case, the display panel performs the relevant drawing process from the first line (the top of the display panel) to the last n-th line (the bottom of the display panel) to complete the display of the target image. In order to display a video, based on image information items input at every moment, the display panel repeats the above scanning process in the horizontal and vertical directions, for each of different images.
-
FIG. 6A is a diagram utilized to explain a display shift produced in an image display system related to an embodiment of the present invention.FIG. 6B is a diagram utilized to show an example of displayed images in individual frames. - In
FIG. 6A , time is shown along the horizontal axis and the vertical axis corresponds to the vertical direction of each display panel, by which transition in the display image in each display panel is shown.FIG. 6B shows display images of (N−1)th, N-th, and (N+1)th frames. - In the following case, in an image display system utilizing a multi-display in which display panels are arrayed in one or both of the vertical and horizontal directions, the scanning in the vertical direction is synchronously performed between all display panels. In this case, at the moment next to the completion (at time T1) of the drawing of the n-th line where the (N−1)th image is displayed on the entire screen, the individual display panels simultaneously start the drawing of the first line of a different image (i.e., image N) (see
FIG. 6A ). Then, of any two vertically adjacent display panels, the upper display panel still displays the n-th line of the (N−1)th image while the first line of the lower display panel already displays the N-th image. In the image display system using a multi-display, ideally, all display panels display the same image. However, in the above-described display device, a display shift of one frame is always produced at the boundary between the upper and lower adjacent display panels. -
Patent Document 1 displays a technique in which of any two vertically adjacent display panels, the start time of the vertical scanning of the lower display panel is delayed by one frame. According to this technique, it is possible to cancel a display shift of one frame produced at the boundary between the upper and lower adjacent display panels. -
FIG. 7A is a diagram utilized to explain display shift correction means in an image display system related to an embodiment of the present invention.FIG. 7B is a diagram utilized to show an example of displayed images in individual frames. - Similar to
FIGS. 6A and 6B ,FIGS. 7A and 7B respectively show the transition in the display image in each display panel and the display images of (N−1)th, N-th, and (N+1)th frames. As described above, in the image display system described inPatent Document 1, the start time of the vertical scanning of the lower display panel is delayed by one frame. Accordingly, as shown inFIG. 7A , the same image is always displayed at the boundary between the upper and lower display panels. - According to the means of
Patent Document 1, an image display system consists of only two upper and lower panels can be handled by producing only one-frame delay. However, in an image display system consists of three or more display panels arranged vertically, time required to the completion of the drawing is delayed by the number of frames corresponding to the number of the vertically arranged display panels (seeFIG. 7A ). In this case, the time from the start to the completion of the drawing of one image (as a whole) over all of the display panels increases. Accordingly, if a sudden screen switching or the like occurs, then visually, the switching of the image displayed at the lower side is delayed. - The present invention provides an image display device, an image display system, and an image display method.
- As a first mode of the present invention, an image display device has a display panel, the device being utilized to form an image display system in which a plurality of the image display devices are arrayed in one or both of vertical and horizontal directions to display one image as a whole while an image allocated to each device is displayed via the corresponding display panel. The image display device includes: a reading processing unit that reads out image information and delays start of output of this image information by a predetermined period of time determined based on the number of the image display devices which forms the image display system and a row to which the present device belongs in the vertical arrangement.
- As a second mode of the present invention, an image display system, in which a plurality of the image display devices are arrayed in one or both of vertical and horizontal directions to display one image as a whole while an image allocated to each device is displayed via the corresponding display panel, includes:
- each of the image display devices has a reading processing unit that reads out image information and delays start of output of this image information by a predetermined period of time determined based on the number of the image display devices and a row to which the present device belongs in the vertical arrangement.
- As a third mode of the present invention, in an image display method in which a plurality of the image display devices are arrayed in one or both of vertical and horizontal directions to display one image as a whole while an image allocated to each device is displayed via the corresponding display panel:
- a reading processing unit provided in each of the image display devices reads out image information and delays start of output of this image information by a predetermined period of time determined based on the number of the image display devices and a row to which the present device belongs in the vertical arrangement.
- According to the above-described image display device, the image display system, and the image display method, no considerable delay is generated in the operation of displaying one image, and it is possible to reduce a display shift produced at the boundary between the display panels.
-
FIG. 1 is a diagram showing a functional configuration of an image information processing device according to an embodiment of the present invention. -
FIG. 2 is a diagram showing a functional configuration of an image display system according to an embodiment of the present invention. -
FIG. 3 is a diagram showing a timing chart of the vertical synchronizing signal generated by the reading processing unit according to an embodiment of the present invention. -
FIG. 4A is a first diagram utilized to explain an effect based on the operation of the image information processing device according to an embodiment of the present invention. -
FIG. 4B is a diagram utilized to show an example of displayed images in individual frames. -
FIG. 5 is a second diagram utilized to explain an effect based on the operation of the image information processing device according to an embodiment of the present invention. -
FIG. 6A is a diagram utilized to explain a display shift produced in an image display system related to the present invention. -
FIG. 6B is a diagram utilized to show an example of displayed images in individual frames. -
FIG. 7A is a diagram utilized to explain display shift correction means in an image display system related to the present invention. -
FIG. 7B is a diagram utilized to show an example of displayed images in individual frames. - Below, an embodiment of the present invention will be explained with reference to the drawings.
-
FIG. 1 is a diagram showing a functional configuration of an image information processing device according to an embodiment of the present invention. - An image
information processing device 1 pertaining to the present embodiment has awriting processing unit 10, an imageinformation storage unit 11, and areading processing unit 12. -
FIG. 2 is a diagram showing a functional configuration of an image display system according to an embodiment of the present invention. - As shown in
FIG. 2 , animage display system 100 has a plurality of image display devices 5, each including the imageinformation processing device 1, aninformation input unit 2, adrive unit 3, and adisplay panel 4. Here, althoughFIG. 2 shows only one image display device 5, theimage display system 100 actually includes the plurality of the image display devices 5. - The image display devices 5, each including the image
information processing device 1, theinformation input unit 2, thedrive unit 3, and thedisplay panel 4, display images allocated to the individual image display devices 5 via thedisplay panels 4 provided therein. Such image display devices 5 are arrayed in one or both of the vertical and horizontal directions so as to form theimage display system 100 which displays one image as a whole. - Here, the image
information processing device 1 stores information, in advance in a storage unit (not shown), about a position to which the image display device 5 provided with this imageinformation processing device 1 belongs. For example, when theimage display system 100 is formed by arranging three image display devices 5 both in the vertical and horizontal directions, the imageinformation processing device 1 stores arrangement information of the image display devices 5 (it may be represented by X and Y coordinates, where X and Y each have a value of 1 to 3). - Based on the arrangement information, the image
information processing device 1 applies a predetermined process to image information input to the corresponding image display device 5 and outputs the image information (to which the predetermined process has been applied) to thedisplay panel 4 of the relevant image display device 5. - In the explanation below, the above condition such that the
image display system 100 is formed by arranging three image display devices 5 both in the vertical and horizontal directions is employed. However, the present embodiment is not limited to such an arrangement. - Next, each functional unit will be explained.
- The
writing processing unit 10 is a functional unit to receive image information from an external device at every moment and store received individual information items serially in the imageinformation storage unit 11. For example, thewriting processing unit 10 generates a writing clock signal obtained by multiplying a horizontal synchronizing signal to have an integral multiple thereof, where the horizontal synchronizing signal is input together with the image information. Although this generation process of the writing clock signal performed in thewriting processing unit 10 is performed spontaneously by thewriting processing unit 10, it may be performed in accordance with an instruction from a control unit (not shown) provided separately in the imageinformation processing device 1. In addition, the above image information is image information utilized to display a complete (one) image as a whole by the entireimage display system 100. Therefore, the image information is input, in common, into each of the imageinformation processing devices 1 which belongs to the corresponding image display device 5. - The image
information storage unit 11 has an area utilized to temporarily store the image information input into thewriting processing unit 10. The imageinformation storage unit 11 is characterized by having an memory area capable of storing image information of one frame and also image information of at least one line. This imageinformation storage unit 11 is generally a storage device called a “video memory”. - Based on a predetermined vertical synchronizing signal, the
reading processing unit 12 is a functional unit which outputs partial image information allocated to the own device (i.e., the present image display device 5 of this reading processing unit 12) in the image information stored in the imageinformation storage unit 11, to thedisplay panel 4 at every moment. That is, thereading processing unit 12 reads out the partial image information, which is a region allocated to the own device (the image display device 5) in the image information stored in the imageinformation storage unit 11, and outputs the read information to thedisplay panel 4. In this process, thereading processing unit 12 refers to the arrangement information which is stored by the imageinformation processing device 1 in advance. For example, in case of the imageinformation processing device 1 of the image display device 5 located at the upper left corner of the image display system 100 (the location may be represented by “X=1 and Y=1”), thereading processing unit 12 reads out, in the image information stored in the imageinformation storage unit 11, (information of) a region corresponding to the upper left ⅓ of an image to be displayed based on the relevant image information. Furthermore, thereading processing unit 12 outputs the relevant image information by processing the above upper left ⅓ region so as to be displayed as a triple-enlarged image on thedisplay panel 4. Such a process is performed by the imageinformation processing device 1 of each of the image display devices 5 and thus one enlarged image is displayed by the nine image display devices 5 in theimage display system 100. - The
information input unit 2 is a functional unit utilized to receive the image information input from an external device, which may be a video recorder, a video playback device, or the like. If the input image information is an analog signal, theinformation input unit 2 may be provided with an A/D converter. - The
drive unit 3 is a functional unit utilized to perform an electric process of actually displaying a predetermined image on thedisplay panel 4 based on an electrical signal of the image information input from the imageinformation processing device 1. For a typical TFT (Thin Film Transistor) liquid crystal panel, such a functional unit is an electric circuit element called a “gate driver”, a “source driver”, or the like. - The
display panel 4 is a functional unit utilized to display, according to the above electric process of thedrive unit 3 based on the image information, an image based on the relevant image information in a manner visible to users. More specifically, thedisplay panel 4 may be a liquid crystal display panel, an organic EL display panel, a plasma display panel, or the like. In addition, theimage display system 100 implements a large screen by arraying a plurality of the image display devices 5, each including thedisplay panel 4, in one or both of the vertical and horizontal directions. -
FIG. 3 is a diagram showing a timing chart of the vertical synchronizing signal generated by the reading processing unit according to an embodiment of the present invention. - Here, a specific process performed by the
reading processing unit 12 according to the present embodiment will be described with reference toFIG. 3 . First, thereading processing unit 12 receives a first vertical synchronizing signal. The first vertical synchronizing signal is a common signal input into each of the imageinformation processing devices 1, and a reference signal utilized by thedisplay panels 4 to display one image as a whole. As shown inFIG. 3 , the first vertical synchronizing signal is a signal that outputs a negative pulse signal for each frame. Based on the timing decided by the negative pulses, thereading processing unit 12 starts the output of the image information. - At the pulse intervals of the first vertical synchronizing signal, the
writing processing unit 10 writes the image information of one image in the imageinformation storage unit 11 sequentially. - In the present embodiment, “frame” is a unit of the image information, utilized to display one image (from the first line to the n-th line thereof) by one display panel.
- The
reading processing unit 12 in the present embodiment is characterized by delaying the start of the signal output to thedisplay panel 4 by a predetermined period of time determined based on the number (N) of the image display devices 5 arranged vertically. Below, a specific processing thereof will be explained. - First, when the
reading processing unit 12 receives the first vertical synchronizing signal, thereading processing unit 12 refers to the position (X and Y) of thedisplay panel 4 of the present device and the vertical arrangement number N which denotes the number of the image display devices 5 arranged vertically in theimage display system 100. Here, the imageinformation processing device 1 of each of the image display devices 5 which form theimage display system 100 stores the vertical arrangement number N in a predetermined storage unit (not shown) in advance. Since theimage display system 100 explained in the present embodiment is a system in which three image display devices 5 are arrayed in each of the vertical and horizontal directions, the vertical arrangement number N is 3. - The
reading processing unit 12 also delays the start of the signal output to thedisplay panel 4 by a predetermined period of time determined based on the row (i-th row), in the vertical arrangement (number N), to which (the i-th row) the own device (the image display device 5) belongs. In the following explanation, among the image display devices 5 which form theimage display system 100 in the present embodiment, the image display devices 5 which belong to the top row are represented as belonging to “the first row”, the image display devices 5 which belong to the middle row are represented as belonging to “the second row”, and the image display devices 5 which belong to the bottom row are represented as belonging to “the third row”. - First, the
reading processing unit 12 refers to the vertical arrangement number N and the coordinate information of its own device (the image display device 5) to determine which row the own device belongs to. After thereading processing unit 12 identifies the vertical arrangement number (N) and the row (i) to which therelevant display panel 4 belongs, a delay amount Td is computed based on the following formula. Here, “V” in Formula (1) is a unit time length required to display an image per unit frame on one display panel 4 (i.e., “1V” equals a time length required to display an image of one frame). -
- According to Formula (1), the
reading processing unit 12 computes second vertical synchronizing signals as explained below. Since the delay amount Td is 0 when the own device (the image display device 5) belongs to the first row, the correspondingreading processing unit 12 directly uses the received first vertical synchronizing signal as the second vertical synchronizing signal without performing any process for the first vertical synchronizing signal (seeFIG. 3 ). Since the delay amount Td is ½V (i.e., (½)V) when the own device belongs to the second row, the correspondingreading processing unit 12 applies a delay shift of ½V to the first vertical synchronizing signal and uses the delayed signal as the second vertical synchronizing signal (seeFIG. 3 ). Additionally, since the delay amount Td is 1V when the own device belongs to the third row, the correspondingreading processing unit 12 applies a delay shift of 1V to the first vertical synchronizing signal and uses the delayed signal as the second vertical synchronizing signal (seeFIG. 3 ). - The
reading processing units 12 of the image display devices 5 arranged in the first row each read out partial image information (for the first row) allocated to each device from the imageinformation storage unit 11 and outputs the relevant partial image information from time T0 to time T1 (i.e., after 1V), by performing no delay operation. In this process, thereading processing unit 12 displays an image based on the partial image information in a triple-enlarged manner. - The
reading processing units 12 of the image display devices 5 arranged in the second row each read out partial image information (for the second row) allocated to each device from the imageinformation storage unit 11 and outputs the relevant partial image information from time T01 to time T11 (i.e., after 1V), by applying a delay of ½V to time T0. In this process, thereading processing unit 12 also displays an image based on the partial image information in a triple-enlarged manner. - Similarly, the
reading processing units 12 of the image display devices 5 arranged in the third row each read out partial image information (for the third row) allocated to each device from the imageinformation storage unit 1 and outputs the relevant partial image information from time T1 to time T2 (i.e., after 1V), by applying a delay of 1V to time T0. In this process, thereading processing unit 12 also displays an image based on the partial image information in a triple-enlarged manner. -
FIG. 4A is a first diagram utilized to explain an effect based on the operation of the image information processing device according to an embodiment of the present invention.FIG. 4B is a diagram utilized to show an example of displayed images in individual frames. - Similar to
FIGS. 6A and 6B orFIGS. 7A and 7B ,FIGS. 4A and 4B respectively show a transition in the image displayed in the image display devices 5 and display images of (N−1)th, N-th, and (N+1)th frames. For example,FIG. 4A shows that the first line of each display panel in the first row starts display of image N−1 (i.e., the (N−1)th image) from time T0 and the displayed image is switched to image N at time T1.FIG. 4A also shows that the n-th line of thedisplay panel 4 of each image display device 5 in the first row starts display of image N−1 from time T1 and the displayed image is switched to image N at time T2. - In addition, as shown in
FIG. 4A , the first line of thedisplay panel 4 of each image display device 5 in the second row starts display of image N−1 from time T01 and the displayed image is switched to image N at time T11. Additionally, the n-th line of thedisplay panel 4 of the image display device 5 in the second row starts display of image N−1 from time T11 and the displayed image is switched to image N at time T21. Furthermore, the first line of thedisplay panel 4 of each image display device 5 in the third row starts display of image N−1 from time T1 and the displayed image is switched to image N at time T2. Additionally, the n-th line of thedisplay panel 4 of the image display device 5 in the third row starts display of image N−1 from time T2 and the displayed image is switched to image N at time T3. - As described above, according to the operation of the image
information processing device 1 in the present embodiment, display of each image display device 5 in the first row is started at time T0. That is, for image N−1, thedisplay panel 4 of each image display device 5 located in the first row starts the display of the first line at T0, sequentially advances the relevant drawing within thetime length 1V, and completes the drawing of the n-th line at time T1. At this time T1, thedisplay panel 4 of each image display device 5 in the first row completes the image N−1. - In contrast, for image N−1, the
display panel 4 of each image display device 5 located in the second row starts the display of the first line at T01 when ½V has just elapsed from time T0 (seeFIG. 4A ). At this time T01, thedisplay panel 4 of each image display device 5 located in the first row has completed the drawing of only the upper half of image N−1. Thedisplay panel 4 of each image display device 5 in the second row sequentially advances the relevant drawing within thetime length 1V measured from time T01, and completes the drawing of the n-th line at time T11. In this process in the second row, since thedisplay panel 4 of each image display device 5 located in the first row starts the drawing of the next image N from time T1, the image of the n-th line of thedisplay panel 4 of each image display device 5 in the first row coincides with the image of the first line of thedisplay panel 4 of each image display device 5 in the second row within a time length of ½V from time T1 to time T11. - In addition, for image N−1, the
display panel 4 of each image display device 5 located in the third row starts the display of the first line at T1 when 1V has just elapsed from time T0 (seeFIG. 4A ). At this time T1, thedisplay panel 4 of each image display device 5 located in the first row has completed the drawing of the entire image N−1, and thedisplay panel 4 of each image display device 5 located in the second row has completed the drawing of only the upper half of image N−1. Thedisplay panel 4 of each image display device 5 in the third row sequentially advances the relevant drawing within thetime length 1V measured from time T1, and completes the drawing of the n-th line at time T2. In this process in the third row, since thedisplay panel 4 of each image display device 5 located in the second row starts the drawing of the next image N from time T11, the image of the n-th line of thedisplay panel 4 of each image display device 5 in the second row coincides with the image of the first line of thedisplay panel 4 of each image display device 5 in the third row within a time length of ½V from time T11 to time T2. - According to the display operation of an image by the image
information processing device 1, no delay of one frame or greater is produced between the image displayed by the image display devices 5 located in the first row and the image displayed by the image display devices 5 located in the third row. In addition, the imageinformation processing device 1 can perform the image display while generating a time length ½V during which the same image is displayed at the boundary between the upper and lower adjacent display panels. - Therefore, according to the image
information processing device 1 of the present embodiment, no considerable delay is generated in the operation of displaying one image, and it is possible to reduce a display shift produced at the boundary between the display panels. - In order to implement the above operation, the image
information storage unit 11 has an memory area capable of storing image information of one frame and further image information of at least one line. - The
writing processing unit 10 writes the image information of one frame in the imageinformation storage unit 11 sequentially at every moment, based on the first vertical synchronizing signal. That is, inFIG. 4A , thewriting processing unit 10 writes the image information, from image information corresponding to the first line to the image information corresponding to the n-th line, within a time length from time T0 to time T1. In the next time length (from time T1 to time T2), different image information (N) is overwritten on the imageinformation storage unit 11. Accordingly, thewriting processing unit 10 overwrites the image information utilized to the drawing of the next image sequentially for each frame, based on the first vertical synchronizing signal. - Here, the start of overwriting of the image information of image N onto the image information of image N−1 starts at time T1. Therefore, in the
display panel 4 of each image display device 5 located in the first row, the partial image information for the upper ⅓ of image N−1 is present in the imageinformation storage unit 11 during a time length from time T0 to time T1 (during which this partial image information is to be displayed in the relevant display panel 3) without being overwritten with the next image information (of image N). Accordingly, each image display device 5 located in the first row can advance the drawing operation by using the imageinformation storage unit 11 sequentially at every moment, based on the first vertical synchronizing signal without problems. - Additionally, at time T11, in the upper half of the image
information storage unit 11, the partial image information for each image display device 5 located in the second row (i.e., partial image information for the middle ⅓ of image N−1) has already been overwritten with the image information for the next image (i.e., image N). However, at this time (T11), since the display of the present partial image information has completed, the drawing operation can be advanced without problems. - For the partial image information for each image display device 5 located in the third row (i.e., partial image information for the lower ⅓ of image N−1), at time T2 when the n-th line of the
display panel 4 should be displayed, the image information corresponding to the bottom line in the image information of image N−1 stored in the imageinformation storage unit 11 is overwritten with the image information of image N. Therefore, in order to display the image information, which corresponds to the bottom line in the image information of image N−1, in the n-th line of eachdisplay panel 4 of the third row at time T2, it is necessary to store, in advance, the image information for the n-th line of image N−1, separately in a memory area provided as a reserve. Accordingly, in addition to the memory area utilized to store image information of one frame, the imageinformation storage unit 11 also has a memory area utilized to store at least one line. -
FIG. 5 is a second diagram utilized to explain an effect based on the operation of the image information processing device according to an embodiment of the present invention.FIG. 5 shows a transition in the display of each image display device 5 in a case in which four image display devices 5 are arrayed vertically (i.e., N=4). When the vertical arrangement number N is 4, according to Formula (1), thereading processing unit 12 of each image display device 5 determines that a delay amount of ⅓V is assigned to thedisplay panels 4 in the second row, a delay amount of ⅔V is assigned to thedisplay panels 4 in the third row, and a delay amount of 1V is assigned to thedisplay panels 4 in the fourth row. - In this case, for image N−1, the
display panel 4 of each image display device 5 in the second row starts the drawing of the first line at time T01 when ⅓V has just elapsed from time T0 (seeFIG. 5 ). Thedisplay panel 4 of each image display device 5 in the second row sequentially advances the relevant drawing within thetime length 1V measured from time T01, and completes the drawing of the n-th line at time T11. In this process, within a time length of ⅓V from time T1 to time T11, the image of the n-th line of thedisplay panel 4 of each image display device 5 in the first row coincides with the image of the first line of thedisplay panel 4 of each image display device 5 in the second row. - Similarly, for image N−1, the
display panel 4 of each image display device 5 in the third row starts the drawing of the first line at time T02 when ⅔V has just elapsed from time T0 (seeFIG. 5 ). Thedisplay panel 4 of each image display device 5 in the third row sequentially advances the relevant drawing within thetime length 1V measured from time T02, and completes the drawing of the n-th line at time T12. In this process, within a time length of ⅓V from time T11 to time T12, the image of the n-th line of thedisplay panel 4 of each image display device 5 in the second row coincides with the image of the first line of thedisplay panel 4 of each image display device 5 in the third row. - For the
display panel 4 of each image display device 5 in the third row and thedisplay panel 4 of each image display device 5 in the fourth row, similarly, within a time length of ⅓V from time T12 to time T2, the image of the n-th line of thedisplay panel 4 of each image display device 5 in the third row coincides with the image of the first line of thedisplay panel 4 of each image display device 5 in the fourth row. - As described above, according to the operation of the image
information processing device 1, even when the vertical arrangement number N is 4, no delay of one frame or greater is produced between the image displayed by the image display devices 5 located in the first row and the image displayed by the image display devices 5 located in the fourth row. In addition, the imageinformation processing device 1 can perform the image display while generating a time length ⅓V during which the same image is displayed at the boundary between the upper and lower adjacent display panels. - The above-described
image display system 100 includes a computer system. The individual steps in the operation of theimage display system 100 are stored as a program in a computer-readable storage medium, and the operation is performed when the relevant computer loads and executes the program. The above computer readable storage medium is a magnetic disk, magneto optical disk, CD-ROM, DVD-ROM, semiconductor memory, or the like. In addition, the relevant computer program may be provided to a computer via a communication line, and the computer which received the program may execute the program. - In addition, the
image display system 100 according to an embodiment has a mode in which a plurality of image display devices 5, each including the imageinformation processing device 1 and thedisplay panel 4, by which the imageinformation processing device 1 is assigned with eachdisplay panel 4. However, this mode is not limited in other embodiments. For example, theimage display system 100 may have a form in which a plurality ofdisplay panels 4 and one imageinformation processing device 1 are provided. In this case, the relevant imageinformation processing device 1 may have an image information distribution unit that distributes image information items distributed and output to theindividual display panels 4. - Additionally, the above embodiments have been shows as examples and it is not intended to limit the scope of the invention. These embodiments are capable of being implemented in other various forms, and various omissions, replacement, or variations can be performed without departing from the scope of the invention. These embodiments and their modifications fall within the scope and concept of the invention and are included in the scope of the invention shown in the claims and its equivalents.
- No considerable delay is generated in the operation of displaying one image, and it is possible to reduce a display shift produced at the boundary between the display panels.
-
- 1 image information processing device
- 10 writing processing unit
- 11 image information storage unit
- 12 reading processing unit
- 2 information input unit
- 3 drive unit
- 4 display panel
- 5 image display device
- 100 image display system
Claims (20)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16/119,507 US10339898B2 (en) | 2013-12-05 | 2018-08-31 | Image display device, the image display system, and image display method |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2013/082705 WO2015083269A1 (en) | 2013-12-05 | 2013-12-05 | Image display device, image display system, and image display method |
US201615101390A | 2016-06-02 | 2016-06-02 | |
US16/119,507 US10339898B2 (en) | 2013-12-05 | 2018-08-31 | Image display device, the image display system, and image display method |
Related Parent Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/082705 Continuation WO2015083269A1 (en) | 2013-12-05 | 2013-12-05 | Image display device, image display system, and image display method |
US15/101,390 Continuation US10089961B2 (en) | 2013-12-05 | 2013-12-05 | Image display device, the image display system, and image display method |
Publications (2)
Publication Number | Publication Date |
---|---|
US20190027116A1 true US20190027116A1 (en) | 2019-01-24 |
US10339898B2 US10339898B2 (en) | 2019-07-02 |
Family
ID=53273061
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/101,390 Active 2034-04-22 US10089961B2 (en) | 2013-12-05 | 2013-12-05 | Image display device, the image display system, and image display method |
US16/119,507 Active US10339898B2 (en) | 2013-12-05 | 2018-08-31 | Image display device, the image display system, and image display method |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/101,390 Active 2034-04-22 US10089961B2 (en) | 2013-12-05 | 2013-12-05 | Image display device, the image display system, and image display method |
Country Status (2)
Country | Link |
---|---|
US (2) | US10089961B2 (en) |
WO (1) | WO2015083269A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2015083269A1 (en) * | 2013-12-05 | 2015-06-11 | Necディスプレイソリューションズ株式会社 | Image display device, image display system, and image display method |
JP6598726B2 (en) * | 2016-04-18 | 2019-10-30 | 三菱電機株式会社 | Display terminal device, display device, data processing method, and data processing program |
WO2018216198A1 (en) * | 2017-05-26 | 2018-11-29 | Necディスプレイソリューションズ株式会社 | Multi-screen display system, image display device, image display method, and image display program |
CN110609645B (en) * | 2019-06-25 | 2021-01-29 | 华为技术有限公司 | Control method based on vertical synchronization signal and electronic equipment |
KR102657681B1 (en) * | 2020-08-04 | 2024-04-16 | 삼성전자 주식회사 | Electronic device and method for quickly updating a partial area of the screen |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5244529A (en) * | 1975-10-06 | 1977-04-07 | Hitachi Ltd | Display equipment |
JPS60254186A (en) * | 1984-05-31 | 1985-12-14 | 富士通株式会社 | Display unit |
JPH0683419B2 (en) * | 1988-06-29 | 1994-10-19 | パイオニア株式会社 | Television signal receiver |
JPH03114374A (en) * | 1989-09-28 | 1991-05-15 | Nippon Hoso Kyokai <Nhk> | Video magnification display device |
JPH03132789A (en) | 1989-10-19 | 1991-06-06 | Seiko Epson Corp | Image enlarging display device |
JPH04349492A (en) * | 1991-05-28 | 1992-12-03 | Hitachi Ltd | Multi-video display system |
JPH05204345A (en) * | 1991-09-03 | 1993-08-13 | Philips Gloeilampenfab:Nv | Apparatus for display of image |
JPH09298706A (en) * | 1996-04-30 | 1997-11-18 | Toshiba Corp | Cathode-ray tube device |
JP3149810B2 (en) * | 1997-03-25 | 2001-03-26 | 日本電気株式会社 | Image processing device |
JP3365357B2 (en) * | 1999-07-21 | 2003-01-08 | 日本電気株式会社 | Active matrix type liquid crystal display |
JP2001222269A (en) | 2000-02-10 | 2001-08-17 | Olympus Optical Co Ltd | Multidisplay device |
JP3741199B2 (en) * | 2000-09-13 | 2006-02-01 | セイコーエプソン株式会社 | ELECTRO-OPTICAL DEVICE, ITS DRIVING METHOD, AND ELECTRONIC DEVICE |
JP4010308B2 (en) * | 2004-05-24 | 2007-11-21 | ソニー株式会社 | Display device and driving method of display device |
KR101189277B1 (en) * | 2005-12-06 | 2012-10-09 | 삼성디스플레이 주식회사 | Liquid crystal display |
JP2011048238A (en) * | 2009-08-28 | 2011-03-10 | Seiko Epson Corp | Display controller and electronic equipment using the same |
JP5699733B2 (en) * | 2011-03-25 | 2015-04-15 | 富士ゼロックス株式会社 | Image processing apparatus and program |
US9495923B2 (en) * | 2011-05-18 | 2016-11-15 | Sharp Kabushiki Kaisha | Liquid crystal display device, method of driving liquid crystal display device, and television receiver |
JP2015001549A (en) * | 2013-06-13 | 2015-01-05 | ソニー株式会社 | Signal output apparatus, signal output method, and image display apparatus |
WO2015083269A1 (en) * | 2013-12-05 | 2015-06-11 | Necディスプレイソリューションズ株式会社 | Image display device, image display system, and image display method |
-
2013
- 2013-12-05 WO PCT/JP2013/082705 patent/WO2015083269A1/en active Application Filing
- 2013-12-05 US US15/101,390 patent/US10089961B2/en active Active
-
2018
- 2018-08-31 US US16/119,507 patent/US10339898B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20160372081A1 (en) | 2016-12-22 |
US10339898B2 (en) | 2019-07-02 |
US10089961B2 (en) | 2018-10-02 |
WO2015083269A1 (en) | 2015-06-11 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10339898B2 (en) | Image display device, the image display system, and image display method | |
US9928796B2 (en) | Display device and display method | |
EP3343545B1 (en) | Display panel having gate driver and method for controlling a gate driver | |
KR102001890B1 (en) | Liquid crystal display device | |
KR101473843B1 (en) | Liquid crystal display | |
KR20160032377A (en) | Display device | |
US20050110737A1 (en) | Liquid crystal display device, driving circuit for the same and driving method for the same | |
KR20180036429A (en) | Virtual reality display device and method for driving the same | |
US9177517B2 (en) | Display device and drive method therefor | |
US9837010B2 (en) | Display apparatus outputting scan signals in first and second mode | |
US9299305B2 (en) | Display device and drive method therefor | |
US7932891B2 (en) | Driving method and system thereof for LCD multiple scan | |
JP2008216436A (en) | Image display apparatus | |
KR20170039335A (en) | Display apparatus, displaying method of thereof and display system | |
US20150022509A1 (en) | Display device and drive method therefor | |
KR101112559B1 (en) | Liquid crystal display and driving method thereof | |
KR102423615B1 (en) | Timing controller and display apparatus having the same | |
JP2009186616A (en) | Liquid crystal display device, drive device for liquid crystal display device, method of driving liquid crystal display device, and television receiver | |
US9886883B2 (en) | Display apparatus and a method of operating the same | |
US20110221797A1 (en) | Image display device | |
US9881540B2 (en) | Gate driver and a display apparatus having the same | |
JP5370264B2 (en) | Display device | |
GB2429825A (en) | Multiple scan method for driving a display | |
JP2012173499A (en) | Method for driving liquid crystal display device | |
US20170018255A1 (en) | Display panel driving apparatus, method of driving display panel using the same and display apparatus having the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
FEPP | Fee payment procedure |
Free format text: ENTITY STATUS SET TO UNDISCOUNTED (ORIGINAL EVENT CODE: BIG.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: NOTICE OF ALLOWANCE MAILED -- APPLICATION RECEIVED IN OFFICE OF PUBLICATIONS |
|
STPP | Information on status: patent application and granting procedure in general |
Free format text: PUBLICATIONS -- ISSUE FEE PAYMENT VERIFIED |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: SHARP NEC DISPLAY SOLUTIONS, LTD., JAPAN Free format text: CHANGE OF NAME;ASSIGNOR:NEC DISPLAY SOLUTIONS, LTD.;REEL/FRAME:055256/0755 Effective date: 20201101 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |